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CBSE Board Practice
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Class VI
Class VII
Class VIII
Class IX
Class X
CBSE Grade VII - Exponents and Powers
Question
1
1.
The value of
3
(
-5
3
)
÷
2
(
3
2
)
2
(
-500
243
)
(
-166
81
)
(
-500
243
)
(
-500
241
)
(
-502
243
)
Question
2
2.
Write the given number in usual form
-5.396117
✕
10
-2
-0.0005396117
-0.5396117
-0.005396117
-0.05396117
-5.396117
Question
3
3.
The value of
5
2
✕
(-3)
2
223
225
228
224
225
2
Question
4
4.
Simplify the expression
2
2
✕
2
2
✕
5
2
20
23
2
20
2
20
3
18
2
Question
5
5.
(
c
5
)
(
d
+
4
)
=
c
(
5
d
−
20
)
c
(
d
+
14
)
c
(
d
+
25
)
c
(
5
d
+
9
)
c
(
5
d
+
20
)
Question
6
6.
Simplify the expression
(-8)
2
✕
(-8)
7
(-8)
10
(-8)
8
(-8)
9
(-10)
9
(-6)
9
Question
7
7.
Which of the following statements are true?
a)
(
x
m
)
n
=
(
x
n
)
m
b)
a
m
.
a
n
=
a
m
n
c)
(
x
m
)
n
=
x
(
m
+
n
)
d)
a
0
=
1
(
a
≠
0)
e)
x
m
x
n
=
x
m
n
f)
a
.
x
m
=
a
m
.
x
m
{b,d,a}
{e,f,a}
{c,d}
{b,a}
{a,d}
Question
8
8.
The
power
in the term
3
2
is
-3
3
-2
0
2
Question
9
9.
Write the given number in usual form
4.452166
✕
10
-5
0.004452166
0.0000004452166
0.000004452166
0.00004452166
0.0004452166
Question
10
10.
f
✕
f
✕
f
✕
f
✕
g
✕
g
✕
g
✕
g
✕
h
✕
h
=
3
f
4
g
4
h
2
f
5
g
4
h
2
f
4
g
4
h
2
f
3
g
4
h
2
−
f
4
g
4
h
2
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